EP1170744B1 - Verfahren zur Schnellkonfiguration eines optischen Aufzeichnungs- und Wiedergabegeräts und Gerät dazu - Google Patents

Verfahren zur Schnellkonfiguration eines optischen Aufzeichnungs- und Wiedergabegeräts und Gerät dazu Download PDF

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Publication number
EP1170744B1
EP1170744B1 EP01401716A EP01401716A EP1170744B1 EP 1170744 B1 EP1170744 B1 EP 1170744B1 EP 01401716 A EP01401716 A EP 01401716A EP 01401716 A EP01401716 A EP 01401716A EP 1170744 B1 EP1170744 B1 EP 1170744B1
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EP
European Patent Office
Prior art keywords
recording medium
read
adjustment
identification information
parameter value
Prior art date
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Expired - Lifetime
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EP01401716A
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English (en)
French (fr)
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EP1170744A2 (de
EP1170744A3 (de
Inventor
Dietmar Uhde
Christian Büchler
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THOMSON LICENSING
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Thomson Licensing SAS
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Publication of EP1170744A3 publication Critical patent/EP1170744A3/de
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation

Definitions

  • the present invention relates to a method for quickly producing read and/or write readiness of an apparatus for reading from and/or writing to an optical recording medium, and a correspondingly configured apparatus for reading from and/or writing to an optical recording medium.
  • the optical recording medium After an optical recording medium has been inserted into a corresponding apparatus for reading from and/or writing to this optical recording medium, the optical recording medium can be accessed only after a certain waiting time.
  • This waiting time which may last for tens of seconds for example in the case of DVD-ROM or DVD-Video, is down to the fact that firstly diverse adjustment steps have to be carried out in order to prepare the apparatus for reliable reading from and/or writing to the respective optical recording medium.
  • the adjustment steps to be carried out during this waiting or adjustment time depend, in particular, on the type of optical recording medium used in each case.
  • JP 07-192386 describes a CD player, an identification code of a CD-ROM that has been inserted into the CD player being read and compared with the data stored in a RAM memory. If correspondence is ascertained in this way, setting data that are likewise stored in the RAM memory are read out and used for starting the system.
  • the setting data are setting information items which a user can select during normal operation of the CD player via a menu-controlled interface. In this way, by way of example, menu configurations or game statuses which were created e.g.
  • US 4,872,151 proposes reading an identification code of a compact disc (CD) and comparing it with the identification code already stored in a storage device. If correspondence is ascertained, an order - already stored together with the identification code - for the reproduction of the titles contained on the CD can be loaded and the reproduction of the CD can be carried out in accordance with this loaded order.
  • individual identification of the CD does not take place, since, by way of example, all CDs with the same titles must have the same identification code.
  • DE 31 39 543 A1 proposes a system for automatically controlling record players, an optoelectronic information item being printed on the periphery of the label of a record, the said information item containing record-specific data in the form of a bar code.
  • This optoelectronic information item may comprise data which define for example the speed of revolution, so that reading of this optoelectronic information item enables the automatic control of various record player functions.
  • individual identification of the respective record is not possible with the aid of this optoelectronic information item, since, by way of example, all records of a specific title are printed identically.
  • EP-A-0 442 566 describes an information recording device having adjustable write means, which requires less time to determine the optimum adjustment of the write means. Identification information items of optical disks are detected after insertion or mounting, in order to identify the disk; it is checked whether, for the identified disk, adjustment parameter values are stored; in case of which the adjustment parameter values are used to adjust the device.
  • GB-A-2 332 977 describes a method for discriminating the type of a disk mounted into an optical disk player, and an optical disk player for enabling rapid and accurate discrimination of the disk type. Identification information items of optical disks are detected after mounting, in order to identify the disk type.
  • US-A-4 989195 describes a method for producing read readiness according to the preamble of claim 1, wherein the type of disk mounted into the optical disk player is discriminated.
  • the present invention is based on the object of proposing a method for quickly producing read and/or write readiness of an apparatus for reading from and/or writing to an optical recording medium, and a correspondingly configured apparatus, it being possible to shorten the previously mentioned waiting or adjustment time after the insertion of the optical recording medium into the apparatus.
  • the invention can generally be applied to optical recording media which can be distinguished using individually stored features or identification information items. This is true, in particular, of DVD-ROM media, since the latter often have a "BCA code" ("Burst Cutting Area") which is individually allocated for each medium or each recording medium. After the uniform production of a series of discs, the "Burst Cutting Area” is applied by a burning operation into a specific area of the individual disc. This BCA data area is normally provided for identification and authorization of the disc. Since this BCA data area uniquely identifies a disc, this BCA data area can be used for individual recognition of the corresponding disc.
  • the corresponding identification information of the respective recording medium is detected in order to identify the recording medium.
  • a check is then made to determine whether, for the identified recording medium, adjustment parameter values for operation of the apparatus are stored in a storage device. If this is the case, the adjustment parameter values are read from the storage device and used for adjusting the apparatus, with the result that read and/or write readiness of the apparatus can be rapidly produced.
  • the customary adjustment procedure must be carried out in order to set for example the parameters "focus gain”, “focus offset”, “track gain”, “track offset” or “HF gain” and to prepare the apparatus for reliably reading from and/or writing to the optical recording medium. Afterwards, the list of contents of the recording medium can be read and the first access can be made to a data area prescribed by the respective user.
  • the values - set for the recording medium that has been inserted into the apparatus for the first time - of the previously mentioned adjustment parameters and also, if appropriate, of further control or regulating circuit parameters or of other parameters specific to the individual recording medium are stored together with the corresponding identification information items or individual features of the recording medium, so that when the recording medium is reinserted into the apparatus, they can be read out in the manner previously described and be used for rapidly producing read and/or write readiness of the apparatus.
  • the adjustment parameter values are stored for example in a non-volatile memory within the apparatus or, in the case of an apparatus connected to another device as e.g. to a personal computer (PC), in a configuration file outside the apparatus.
  • the list with the known recording media, together with the corresponding adjustment parameter values can be stored as a non-volatile file on the hard disk of a PC and, in the event of switch-on of the PC and the subsequent initialization of the built-in read and/or write apparatus, can be accepted into a volatile memory of the corresponding apparatus, so that a data exchange between the apparatus and the hard disk of the PC is not necessary every time a recording medium is inserted into the read and/or write apparatus.
  • the content of the BCA data area is read as the identification information which individually identifies the respective recording medium, since this BCA data area comprises relatively coarse structures and can be read very easily by a read apparatus.
  • the objective lens of the playback apparatus is coarsely focused by the focus regulation.
  • Track regulation is not necessary since the BCA information is very large in relation to the scanning beam and lies on a specific diameter of the recording medium. Thus, prior to the reading of the BCA information, it is not necessary to adjust the focus offset or any parameters of the track regulation.
  • the list of contents of the inserted recording medium can also be used as an identification feature, since it is unlikely that a user will have a plurality of recording media having the same content.
  • Individualization of the recording medium can, for example, also be effected via the detection of a printed-on label, for example a bar coding, provided that this is correspondingly unique. Detecting an electrical or magnetic detectable individualization information item also lies within the scope of the invention.
  • the adjustment parameter values for each individual optical recording medium are determined only once, namely when the said recording medium is inserted into the read and/or write apparatus for the first time.
  • the adjustment parameter values that have already been determined previously can be read from a storage device and be used for accelerated adjustment. In this way, the waiting time which is necessary after the insertion of an optical recording medium until access to the optical recording medium can be distinctly reduced.
  • FIG. 1 illustrates an optical recording medium 1, a DVD-ROM disc in the example illustrated, which is made to rotate by a drive unit 3.
  • the "BCA data area" of the DVD-ROM disc 1 is read by an optical read unit 2.
  • This BCA data area uniquely identifies the respectively inserted DVD-ROM disc 1, so that the respectively inserted DVD-ROM disc 1 can be individually inferred by evaluation of the BCA data area.
  • the use of the BCA data area for identifying the DVD-ROM disc 1 is advantageous since this comprises relatively coarse structures and can be read very easily by the read apparatus.
  • the objective lens of the optical read unit 2 is coarsely focused by corresponding focus regulation, while track regulation is not necessary since the BCA data area is very large in relation to the scanning beam of the optical read unit and lies in a specific diameter region of the DVD-ROM disc 1. Consequently, the scanning beam of the optical read unit 2 merely has to be moved to this specific diameter region of the DVD-ROM disc 1, preferably into the centre of the said region.
  • the data read by the optical read unit 2 are communicated to a control unit 4, which uses the read data of the BCA data area to identify the DVD-ROM disc 1 that has been inserted into the apparatus. Furthermore, the control unit 4 accesses a non-volatile memory 5 and checks whether adjustment parameter values that have already been determined during a previous adjustment operation are stored for the identified DVD-ROM disc 1.
  • the individual features or identification information items of the BCA data area which identify the identified DVD-ROM disc 1 are stored together with the values - set by the control unit 4 - of the previously mentioned adjustment parameters in the non-volatile memory 5, so that, in the event of repeated use of the same DVD-ROM disc 1, they can be used in the manner described below for accelerated adjustment of the optical read unit 2.
  • the control unit 4 will ascertain from the identification information items read, by means of a comparison with the list of already known discs which is stored in the memory 5, that the same DVD-ROM disc 1 has already been identified previously and the optical read unit 2 has been correspondingly adjusted.
  • the control unit 4 thereupon reads out the adjustment parameter values stored for the identification information items of the corresponding DVD-ROM disc 1 in the memory 5 and uses them as start values for the adjustment of the optical read unit 2. It may be possible for the adjustment also to be entirely obviated and to begin immediately with the reading of the data required by the user, as a result of which the access to the DVD-ROM disc 1 can be further accelerated.
  • the start values matched according to the invention to the respective individual recording medium are so close to the actually optimal values that the time according to the invention for the adjustment is shortened even when the start values are still adjusted in an optimized manner.
  • the output units illustrated are a display unit 6 and also a loudspeaker 7, via which the information of the DVD-ROM disc 1 read by the optical read unit 2 can be reproduced.
  • general data can also be stored on the DVD-ROM disc 1, which data are forwarded to corresponding evaluation units.
  • the apparatus shown in Figure 1 need not exclusively be a read apparatus, rather, instead of the optical read unit 2, it is also possible to use a combined optical write/read unit or just an optical write unit, so that it is possible to write to and/or read from the optical recording medium 1 used in each case.
  • FIG. 2 A second exemplary embodiment of the present invention is illustrated in Figure 2 , the components corresponding to the components shown in Figure 1 being provided with the same reference symbols.
  • the DVD-ROM read apparatus illustrated is connected to a personal computer (PC).
  • PC personal computer
  • What is used as non-volatile memory for the identification information items of already identified DVD-ROM discs 1 and/or for the corresponding adjustment parameter values is a configuration file of the PC, which is stored for example on the hard disk 8 of the PC.
  • the control unit 4 can access this configuration file of the hard disk 8 at any time in order to ascertain whether, for an identified DVD-ROM disc 1, adjustment parameter values have already been previously determined and stored. If this is the case, the adjustment parameter values stored for the identification information items read are loaded and used for adjusting the optical read unit 2. In the other case, the previously described adjustment steps must be performed and the adjustment parameter values determined in the process must be stored together with the identification information items of the inserted DVD-ROM disc 1 in the configuration file of the hard disk 8.
  • the memory 5 already shown in Figure 1 is additionally used, in which case, in the exemplary embodiment shown in Figure 2 , the memory 5 can also be configured as a volatile memory.
  • the control unit 4 can subsequently carry out the checking of the list of already known DVD-ROM discs 1 by accessing the memory 5. Consequently, a data exchange between the read apparatus and the hard disk 8 is not necessary every time a new DVD-ROM disc 1 is inserted.

Claims (11)

  1. Verfahren zum schnellen Herstellen der Lesebereitschaft eines Geräts zum Lesen oder zum Lesen und Beschreiben eines optischen Aufzeichnungsträgers,
    wobei der Aufzeichnungsträger (1) den jeweiligen Aufzeichnungsträger individuell kennzeichnende Identifizierungsinformationen aufweist,
    umfassend die Schritte:
    a) Erfassen der Identifizierungsinformationen des Aufzeichnungsträgers (1) nach dessen Einlegen in das Gerät, um den Aufzeichnungsträger individuell zu identifizieren,
    b) Überprüfen, ob zu dem individuell identifizierten Aufzeichnungsträger (1) in Speichermitteln (5, 8) mindestens ein Abgleichparameterwert für den Betrieb des Geräts gespeichert ist, und
    c) Auslesen des Abgleichparameterwerts aus den Speichermitteln (5, 8), falls die im Schritt b) durchgeführte Überprüfung positiv ist, und Abgleichen des Geräts entsprechend dem ausgelesenen Abgleichparameterwert, um einen Datenbereich des Aufzeichnungsträgers (1) lesen zu können,
    dadurch gekennzeichnet, daß die Identifizierungsinformation nach grober Fokussierung und vor Durchführung der Abgleichvorgänge bezüglich der Abgleichparameter für Fokus oder Spur des Geräts erfaßt wird.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet, daß für den Fall, daß die in Schritt b) durchgeführte Überprüfung negativ ist, Abgleichvorgänge bezüglich der Abgleichparameter für Fokus oder Spur des Geräts durchgeführt werden und anschließend für den identifizierten Aufzeichnungsträger (1) mindestens ein dem abgeglichenen Zustand des Geräts entsprechender Abgleichparameterwert für Fokus oder Spur in den Speichermitteln (5, 8) abgespeichert wird.
  3. Verfahren nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß als Speichermittel ein nichtflüchtiger Speicher (5) des Geräts oder eine auf einem nichtflüchtigen Datenträger (8) gespeicherte Datei verwendet wird.
  4. Verfahren nach Anspruch 3,
    dadurch gekennzeichnet, daß der nichtflüchtige Datenträger (8) extern von dem Gerät vorgesehen ist und
    daß der Inhalt der Datei des nichtflüchtigen Datenträgers (8) in einen in dem Gerät vorgesehenen Speicher (5) übernommen wird, auf den in den Schritten b) und c) zugegriffen wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß im Schritt a) als Tdentifizierungsinformation ein BCA-Datenbereich des optischen Aufzeichnungsträgers (1) gelesen wird.
  6. Gerät zum Lesen oder Lesen und Beschreiben eines optischen Aufzeichnungsträgers,
    wobei der Aufzeichnungsträger (1) den jeweiligen Aufzeichnungsträger individuell kennzeichnende Identifizierungsinformationen aufweist,
    mit Erfassungsmitteln (2) zum Erfassen der Identifizierungsinformationen eines in das Gerät eingelegten Aufzeichnungsträgers (1),
    mit Speichermitteln (5, 8) und Steuermitteln (4) zum individuellen Identifizieren des in das Gerät eingelegten Aufzeichnungsträgers (1) anhand der erfaßten Identifizierungsinformationen und zum Überprüfen, ob zu dem individuell identifizierten Aufzeichnungsträger (1) in den Speichermitteln (5, 8) mindestens ein Abgleichparameterwert für Fokus oder Spur des Geräts gespeichert ist,
    wobei die Steuermittel (4) derart ausgestaltet sind, daß sie für den Fall, daß zu dem identifizierten Aufzeichnungsträger (1) ein Abgleichparameterwert in den Speichermitteln (5, 8) erkannt werden konnte, den Abgleichparameterwert aus den Speichermitteln (5, 8) auslesen und Lesemittel (2) des Geräts entsprechend dem gelesenen Abgleichparameterwert abgleichen, um über die Lesemittel (2) einen Datenbereich des Aufzeichnungsträgers (1) lesen zu können,
    dadurch gekennzeichnet, daß die Erfassungsmittel so ausgestattet sind, daß sie die Identifizierungsinformation nach grober Fokussierung und vor Durchführung der Abgleichvorgänge bezüglich der Abgleichparameter für Fokus oder Spur des Geräts erfassen.
  7. Gerät nach Anspruch 6,
    dadurch gekennzeichnet, daß die Erfassungsmittel durch die Lesemittel (2) gebildet sind.
  8. Gerät nach Anspruch 6 oder 7,
    dadurch gekennzeichnet, daß die Steuermittel (4) derart ausgestaltet sind, daß sie für den Fall, daß in den Speichermitteln (5, 8) für den identifizierten Aufzeichnungsträger (1) kein Abgleichparameterwert erkannt werden konnte, einen Abgleich der Lesemittel (2) durchführen und für den identifizierten Aufzeichnungsträger (1) mindestens einen dem abgeglichenen Zustand der Lesemittel (2) entsprechenden Abgleichparameterwert in den Speichermitteln (5, 8) speichern.
  9. Gerät nach einem der Ansprüche 6-8,
    dadurch gekennzeichnet, daß die Speichermittel einen nichtflüchtigen Speicher (5) des Geräts oder einen extern von dem Gerät vorgesehenen nichtflüchtigen Datenträger (8) umfassen.
  10. Gerät nach einem der Ansprüche 6-9,
    dadurch gekennzeichnet, daß die Erfassungsmittel (2) derart ausgestaltet sind, daß sie als die den in das Gerät eingelegten Aufzeichnungsträger (1) individuell kennzeichnenden Identifizierungsinformationen einen BCA-Datenbereich des Aufzeichnungsträgers (1) lesen.
  11. Gerät nach einem Ansprüche 6-10,
    dadurch gekennzeichnet, daß das Gerät zum Lesen einer DVD-ROM-Platte (1) als optischer Aufzeichnungsträger ausgestaltet ist.
EP01401716A 2000-07-05 2001-06-27 Verfahren zur Schnellkonfiguration eines optischen Aufzeichnungs- und Wiedergabegeräts und Gerät dazu Expired - Lifetime EP1170744B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10032034A DE10032034A1 (de) 2000-07-05 2000-07-05 Verfahren zum schnellen Herstellen der Lese- und/oder Scshreibbereitschaft eines Geräts zum Lesen und/oder Beschreiben eines optischen Aufzeichnungsträgers sowie entsprechend ausgestaltetes Gerät
DE10032034 2000-07-05

Publications (3)

Publication Number Publication Date
EP1170744A2 EP1170744A2 (de) 2002-01-09
EP1170744A3 EP1170744A3 (de) 2003-02-05
EP1170744B1 true EP1170744B1 (de) 2008-04-16

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US (1) US20020003757A1 (de)
EP (1) EP1170744B1 (de)
JP (1) JP2002056544A (de)
CN (1) CN1254794C (de)
DE (2) DE10032034A1 (de)
TW (1) TWI226053B (de)

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DE60133604D1 (de) 2008-05-29
EP1170744A2 (de) 2002-01-09
US20020003757A1 (en) 2002-01-10
EP1170744A3 (de) 2003-02-05
CN1254794C (zh) 2006-05-03
JP2002056544A (ja) 2002-02-22
DE60133604T2 (de) 2009-05-28
TWI226053B (en) 2005-01-01
CN1337677A (zh) 2002-02-27
DE10032034A1 (de) 2002-01-17

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